Tate-chu-yoko used in horizontal subtitle in the span '＠組［100］＠'
The LambdaCap file has invalid content. For instance, it could have a missing timecode field, has incorrect placement attribute designators, uses half-width digits in vertical subs or incorrectly uses Tate-chu-yoko in horizontal subs. The error message will relay the precise issue along with which event is affected.
Review the subtitle event listed in the error message and correct the issue.